Decorative knob



FIG. 1 is a perspective view of a decorative knob showing my new design;

FIG. 2 is a front view thereof;

FIG. 3 is a rear view thereof;

FIG. 4 is a top plan view thereof;

FIG. 5 is a bottom plan view thereof; and,

FIG. 6 is a cross-sectional view thereof taken along lines 6--6 of FIG.2.

The ornamental design for a "decorative knob", as shown.